The basic activities a person usually accomplishes during a normal day, such as eating, dressing, and bathing

Activities of daily living

Agitated delirium

A change in the way a person thinks and behaves that may signal disease in the central nervous system or elsewhere in the body

Altered mental status

3

How a person functions or acts in response to his or her environment

Behavior

4

The point at which a person's reaction to events interfere with activities of daily living; this becomes a psychiatric emergency when it causes a major life interruption, such as an attempted suicide

Behavioral crisis

5

A persistent mood of sadness, despair, and discouragement; may be a symptom of many different mental and physical disorders, or it may be a disorder on its own

Depression

6

A disorder in which there is no known physiologic reason for the abnormal functioning of an organ or organ system

Functional disorder

7

Temporary or permanent dysfunction of the brain, caused by a disturbance in the physical or physiological functioning of brain tissue

Organic brain syndrome

8

An illness with psychological or behavioral symptoms and/or impairment in functioning caused by a social, psychological, genetic, physical, chemical, or biological disturbance

Psychiatric disorder

9

An emergency in which abnormal behavior threatens a person's own health and safety or the health and safety of another person, for example when a person becomes suicidal, homicidal, or has a psychotic episode